Mortgage-backed bonds (MBB) and mortgage pass-through (MPT) securites both represent the concept of "securitization". Which of the following is the best definition for this?

		A way to use home mortgages to provide complete security that investors will receive all their principal back at the end of the term.
		A way to take an illiquid asset, combine it with others and establish a security backed by these assets with a marketplace that provides liquidity - thus transforming an illiquid asset into a liquid one.
		A concept whereby homeowners feel secure in their ability to find financing for home purchases because a major capital marketplace is supporting the process.
		A process where an investment banking firms creates a sales pipeline by purchasing mortgages and selling them directly to investors